package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserImpl implements UserService {

    private static final String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    WeChatProperties weChatProperties;

    @Autowired
    UserMapper userMapper;


    @Override
    public User Login(UserLoginDTO DTO) {
        String openID = getOPenid(DTO.getCode());
        if (openID == null) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        User uu = userMapper.getUserByOPenID(openID);
        if (uu == null) {
            uu = User.builder()
                    .openid(openID)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insertUser(uu);
        }

        return uu;
    }

    String getOPenid(String code) {
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");

        String json = HttpClientUtil.doGet(WX_LOGIN_URL, map);
        JSONObject job = JSON.parseObject(json);
        String openID = job.getString("openid");
        return openID;
    }
}
